Adjustable bedspring



Dec. 24,1940. NS N 2,225,895

ADJUSTABLE BEDSPRING v Filed March 6, 1937 2 Sheets-Sheet 1 N Jerome T #:7117130 1940 J. T. ATKINSON ADJUSTABLE BEDSPRING Filed March 6, 1937 2 Sheets-Sheet 2 Jerome Tfiiia'ns'm Patented Dec. 24, 1940 UNITED STATE-S PATENT, OFFICE 2 Claims.

The present invention relates to bedsprings and reinforcing or trussing means therefor and consists in the combinations and arrangements of elements hereinafter described and particularly set forth in the accompanying claims.

With bedsprings as now constructed there is a tendency to sag as a consequence of being constantly subjected to heavy weight, and likewise mattresses get thinner at the center through constant use, and as a result of. those conditions the sleeping surface of the mattress sags with disagreeable consequences which are obvious.

To overcome these disadvantages it is the purpose of the present invention to provide beneath the mattress spring a novel form or set of adjustable coil springs whereby the flat top mattress spring may be crowned simply by raising the adjustable coil springs thus arching the center of the mattress spring and thereby compensating for any excessive give or sag in the mattress. And a further advantage is that the trussing means also functions to increase the durability or longevity of the bed without in the least detracting from its maximum utility by way of comfort or 25 otherwise. Q

In addition to the foregoing, the invention disclosed herein possesses other advantages which are set forth and will be evident in course of the following detailed description of the drawings.

Other embodiments of the invention exemplified herein are shown in my three (3) co-pending applications for United States patents filed of even date herewith under Serial Nos. 129,489, 129,491 and 129,492, respectively.

In the accompanying drawings:

Figure 1 is a top plan view showing a bedspring with the trussing device incorporated therein.

Figure 2 a horizontal sectional view thereof taken on the line 22 of Figure 1.

Figure 3 a transverse sectional view taken on the line 3-3 of Figure 1, and

Figure 4 a detailed view of the spring supporting frame of the trussing device.

Referring to the construction in further detail and wherein like reference characters designate corresponding parts in the different figures shown, the invention consists of a bedspring fabric 6 of suitable design connected at its ends to a rigid and metal frame 1, preferably of angleiron by spring members 8, and the side portions thereof are connected with said frame 1 through springs 9 as shown. It will be understood, of course, that the spring and frame structure and their connections just described are illustrative only and that the invention may be applied to bedsprings and frames of different types with equally good results.

The spring reinforcing means or trussing device consists essentially of a plurality of springs I of spiral type located at appropriate points about the middle portion of the spring fabric 6, as in dicated in Figures 1, and while only six of these springs II] are disclosed herein it will be obvious that any other number may be employed.

The several springs ID are suitably mounted 10 upon and secured to a rigid and metal frame H of substantially rectangular design, as in Figure 4, and said frame is mounted in suspended relation from the spring frame 1 by two or more trussing rods l 2 whose end portions 13 are suitably hooked :15

to engage within apertures H! in the end bars of frame I (see Figure 1). Said truss rods are connected with the lateral extensions l5 of frame II as shown and the inner ends l6 of said rods I2 connect with screw eyes I! of turn-buckles [8 whereby the tension thereon may be conveniently regulated.

Each of the springs ID has its uppermost coil lying in close contact with the underside of the spring fabric 6 (Figure 2) and, it will be noted, the vertical central axis of each spring I0 is in substantially vertical alinement with the rigid frame portion I I to which it is secured and thereby all vertical strains to which the springs [0 are subjected will be exerted directly against said frame, and thereby is avoided any tendency to said springs sagging which would otherwise likely result were the springs and their rigid supporting structure not in this vertical alinement.

The several trussing springs III are anchored and secured to the rigid frame H by means of locking wires one for each pair of springs, and as shown in Figure 2 each of said wires has its respective ends 2| reversely bent to engage the lowermost coil at diametrically opposite points, and intermediate thereof with the rigid frame portion II as indicated.

It will thus be seen that with this arrangement each of the supporting springs 10 of the trussing devices will be securely locked to the frame II and so held thereon that the vertical central axis of said spring will lie at all times perpendicular to the plane of the bedspring fabric and accordingly the full maximum resiliency of the springs may be availed of. Also it will be noted that with this arrangement any tendency of the spring fabric 6 to sag may be avoided or taken up by merely adjusting the tum-buckles l8 and accordingly the level of the bedspring 6 may be maintained uniform at all times and this quite regardless of any varying strains or unusually heavy loads to which the bedspring may be subjected.

It will be understood the invention as herein disclosed is not limited to the details of construction shown and described, and that these may be varied widely without departing from the spirit of the invention as defined by the claims.

What is claimed as new is:

1. In a bedspring, a rectangular main frame supporting a resilient load-bearing member, resilient means including a laterally disposed rigid rectangular truss frame for reenforcing said loadbearing member, and trussing members rigidly connecting both opposite ends of said truss frame with said main frame at points thereon inwardly disposed with respect to the points at which said trussing members engage said truss frame, whereby the resulting opposed inwardly acting tension of said trussing members on said truss frame will maintain said truss frame in its proper transverse and longitudinal position relative to said main frame and said load-bearing member.

2. In a bedspring, a rectangular main frame supporting a resilient load-bearing member, resilient means including a laterally disposed rigid rectangular truss frame for reenforcing said loadbearing member, and trussing members adjustably and rigidly connecting both opposite ends of said truss frame with said main frame at points thereon inwardly disposed with respect to the points at which said trussing members engage said truss frame, whereby the resulting opposed inwardly acting tension of said trussing members on said truss frame will maintain said truss frame in its'proper transverse and longitudinal position relative to said main frame and said load bearing member.

JEROME T. ATKINSON. 

